Missouri Ballot Issue HistoryQuery and sort the data by clicking the radio buttons and then Submit.
Type in various "Percent Yes" values to see which issues would have passed within the range you specify
.
This data is from the Missouri Legislative Academy Report 25 – David C. Valentine 2008 – http://truman.missouri.edu/ipp/legacad .

A9 - Adds "electronic data and communications to the things protected from unreasonable search and seizure in Art, I Sec. 15

2014-08-05

728,549

246,020

74.76

passed

General Assembly

383

383

Constitutional Amendment

A 2 - Relating to allowing evidence of prior criminal acts to be admissible in prosecutions for crimes of a sexual nature involving a victim under eighteen years of age

2014-11-04

1,018,773

396,519

71.98

passed

General Assembly

384

384

Constitutional Amendment

A 3 - Teacher tenure and evaluation procedures

2014-11-04

339,422

1,100,628

23.57

failed

Ballot Initiative

385

385

Constitutional Amendment

A 6 - Early voting

2014-11-04

416,447

985,966

29.69

failed

General Assembly

386

386

Constitutional Amendment

A 10 - requires governor to pay the public debt. prohibits governor from relying on revenue from legislation not yet passed when proposing a budget, provides a legislative check on the governorâ€™s decisions to restrict funding